Adjustable mailbox mounting platform



FIG. 1 is a top, front and right end perspective view of an adjustable mailbox mounting platform showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a front elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a bottom plan view;

FIG. 6 is a right end elevational view;

FIG. 7 is a left end elevational view; and

FIG. 8 is an exploded perspective view thereof on a reduced scale, the broken line showing of a mailbox, post, nuts and bolts is illustrative of environmental structure only and forms no part of the claimed design. 

The ornamental design for an adjustable mailbox mounting platform, as shown and described. 